Using the Aimpoint 6XMag - 1 Magnifier is easy. First, if you're using it with an Aimpoint red dot sight, just mount it behind the sight. This way, you don't have to re - zero when you switch between magnified and non - magnified aiming. For long - distance target acquisition, pair it with the compatible Micro T - 2™/H - 2™ or CompM5™ sights. If you want to use it as a hand - held monocular, hold it by the rubber - covered grip for a good hold. When adjusting the dot, use the windage and elevation controls for quick centering. Adjust the dioptric setting (-3 to +3) to suit your eyes. As for maintenance, keep it dry. After it gets wet, dry it thoroughly. Store it in a cool, dry place within the temperature range of - 49°F to +160°F. Also, don't expose it to strong impacts as it's shockproof but excessive force could damage it. The screws and Allen key are included, so make sure to keep them safe in case you need to do any minor adjustments.